Charles Spurgeon Commentary Acts 26:9-10

"I verily thought with myself that I ought to do many things contrary to the name of Jesus of Nazareth. And this I also did in Jerusalem: and I both shut up many of the saints in prisons, having received authority from the chief priests, and when they were put to death I gave my vote against them." — Acts 26:9-10 (ASV)

I verily thought with myself, that I ought to do many things contrary to the name of Jesus of Nazareth. Which thing I also did in Jerusalem:

For Paul was the kind of man who, if he thought he ought to do anything, he always did it. Even in his unregenerate state, his conscience, unenlightened as it was, swayed him; but now, with an enlightened conscience, he looked back upon that part of his life with deep regret, and he did not fail to acknowledge and mourn the wrong that he had ignorantly done to the Lord Jesus Christ and his faithful followers.